The indictment accuses Kelly of sexual acts with three children older than 13 but younger than 17. There is no age range listed for one of the alleged victims. The charges say Kelly used force or the threat of force.

Homeland Security Investigations is involved in an investigation of Kelly, an US Immigration and Customs Enforcement official said. The official did not provide any details. The news was first reported by the New Yorker.

Newly discovered video

A grand jury was convened in Cook County, Illinois, earlier this month in connection with new allegations against Kelly, two sources close to the case told CNN.

Steve Greenberg, an attorney for Kelly, told CNN earlier this month he had not been notified of a grand jury. After being asked about the new tape, he said separately he and his colleagues were unaware of any new information involving Kelly.

CNN has seen the VHS tape that appears to show Kelly having sex with a girl who refers to her body parts as 14 years old.

The newly unearthed footage, which lasts 42 minutes and 45 seconds, is clear and explicit.